1 /* Default language-specific hooks.
2 Copyright (C) 2001-2013 Free Software Foundation, Inc.
3 Contributed by Alexandre Oliva <aoliva@redhat.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
28 #include "stringpool.h"
30 #include "tree-inline.h"
34 #include "insn-config.h"
36 #include "langhooks.h"
38 #include "langhooks-def.h"
40 #include "diagnostic.h"
41 #include "tree-diagnostic.h"
46 /* Do nothing; in many cases the default hook. */
53 /* Do nothing (tree). */
56 lhd_do_nothing_t (tree
ARG_UNUSED (t
))
60 /* Pass through (tree). */
62 lhd_pass_through_t (tree t
)
67 /* Do nothing (int, int, int). Return NULL_TREE. */
70 lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i
),
77 /* Do nothing (function). */
80 lhd_do_nothing_f (struct function
* ARG_UNUSED (f
))
84 /* Do nothing (return NULL_TREE). */
87 lhd_return_null_tree_v (void)
92 /* Do nothing (return NULL_TREE). */
95 lhd_return_null_tree (tree
ARG_UNUSED (t
))
100 /* Do nothing (return NULL_TREE). */
103 lhd_return_null_const_tree (const_tree
ARG_UNUSED (t
))
108 /* The default post options hook. */
111 lhd_post_options (const char ** ARG_UNUSED (pfilename
))
113 /* Excess precision other than "fast" requires front-end
115 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
119 /* Called from by print-tree.c. */
122 lhd_print_tree_nothing (FILE * ARG_UNUSED (file
),
123 tree
ARG_UNUSED (node
),
124 int ARG_UNUSED (indent
))
128 /* Called from check_global_declarations. */
131 lhd_warn_unused_global_decl (const_tree decl
)
133 /* This is what used to exist in check_global_declarations. Probably
134 not many of these actually apply to non-C languages. */
136 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
))
138 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_READONLY (decl
))
140 if (DECL_IN_SYSTEM_HEADER (decl
))
146 /* Set the DECL_ASSEMBLER_NAME for DECL. */
148 lhd_set_decl_assembler_name (tree decl
)
152 /* The language-independent code should never use the
153 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
154 VAR_DECLs for variables with static storage duration need a real
155 DECL_ASSEMBLER_NAME. */
156 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
157 || (TREE_CODE (decl
) == VAR_DECL
158 && (TREE_STATIC (decl
)
159 || DECL_EXTERNAL (decl
)
160 || TREE_PUBLIC (decl
))));
162 /* By default, assume the name to use in assembly code is the same
163 as that used in the source language. (That's correct for C, and
164 GCC used to set DECL_ASSEMBLER_NAME to the same value as
165 DECL_NAME in build_decl, so this choice provides backwards
166 compatibility with existing front-ends. This assumption is wrapped
167 in a target hook, to allow for target-specific modification of the
170 Can't use just the variable's own name for a variable whose scope
171 is less than the whole compilation. Concatenate a distinguishing
172 number - we use the DECL_UID. */
174 if (TREE_PUBLIC (decl
) || DECL_FILE_SCOPE_P (decl
))
175 id
= targetm
.mangle_decl_assembler_name (decl
, DECL_NAME (decl
));
178 const char *name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
181 ASM_FORMAT_PRIVATE_NAME (label
, name
, DECL_UID (decl
));
182 id
= get_identifier (label
);
184 SET_DECL_ASSEMBLER_NAME (decl
, id
);
188 /* Type promotion for variable arguments. */
190 lhd_type_promotes_to (tree
ARG_UNUSED (type
))
195 /* Registration of machine- or os-specific builtin types. */
197 lhd_register_builtin_type (tree
ARG_UNUSED (type
),
198 const char * ARG_UNUSED (name
))
202 /* Invalid use of an incomplete type. */
204 lhd_incomplete_type_error (const_tree
ARG_UNUSED (value
), const_tree type
)
206 gcc_assert (TREE_CODE (type
) == ERROR_MARK
);
210 /* Provide a default routine for alias sets that always returns -1. This
211 is used by languages that don't need to do anything special. */
214 lhd_get_alias_set (tree
ARG_UNUSED (t
))
219 /* This is the default decl_printable_name function. */
222 lhd_decl_printable_name (tree decl
, int ARG_UNUSED (verbosity
))
224 gcc_assert (decl
&& DECL_NAME (decl
));
225 return IDENTIFIER_POINTER (DECL_NAME (decl
));
228 /* This is the default dwarf_name function. */
231 lhd_dwarf_name (tree t
, int verbosity
)
233 gcc_assert (DECL_P (t
));
235 return lang_hooks
.decl_printable_name (t
, verbosity
);
238 /* This compares two types for equivalence ("compatible" in C-based languages).
239 This routine should only return 1 if it is sure. It should not be used
240 in contexts where erroneously returning 0 causes problems. */
243 lhd_types_compatible_p (tree x
, tree y
)
245 return TYPE_MAIN_VARIANT (x
) == TYPE_MAIN_VARIANT (y
);
248 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
249 nodes. Returns nonzero if it does not want the usual dumping of the
253 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED
, tree t ATTRIBUTE_UNUSED
)
258 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
259 language-specific way. */
262 lhd_tree_dump_type_quals (const_tree t
)
264 return TYPE_QUALS (t
);
267 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
270 lhd_gimplify_expr (tree
*expr_p ATTRIBUTE_UNUSED
,
271 gimple_seq
*pre_p ATTRIBUTE_UNUSED
,
272 gimple_seq
*post_p ATTRIBUTE_UNUSED
)
277 /* lang_hooks.tree_size: Determine the size of a tree with code C,
278 which is a language-specific tree code in category tcc_constant or
279 tcc_exceptional. The default expects never to be called. */
281 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED
)
286 /* Return true if decl, which is a function decl, may be called by a
290 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED
)
295 /* lang_hooks.decls.final_write_globals: perform final processing on
298 write_global_declarations (void)
300 tree globals
, decl
, *vec
;
303 timevar_start (TV_PHASE_DEFERRED
);
304 /* Really define vars that have had only a tentative definition.
305 Really output inline functions that must actually be callable
306 and have not been output so far. */
308 globals
= lang_hooks
.decls
.getdecls ();
309 len
= list_length (globals
);
310 vec
= XNEWVEC (tree
, len
);
312 /* Process the decls in reverse order--earliest first.
313 Put them into VEC from back to front, then take out from front. */
315 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= DECL_CHAIN (decl
))
316 vec
[len
- i
- 1] = decl
;
318 wrapup_global_declarations (vec
, len
);
319 check_global_declarations (vec
, len
);
320 timevar_stop (TV_PHASE_DEFERRED
);
322 timevar_start (TV_PHASE_OPT_GEN
);
323 /* This lang hook is dual-purposed, and also finalizes the
325 finalize_compilation_unit ();
326 timevar_stop (TV_PHASE_OPT_GEN
);
328 timevar_start (TV_PHASE_DBGINFO
);
329 emit_debug_global_declarations (vec
, len
);
330 timevar_stop (TV_PHASE_DBGINFO
);
336 /* Called to perform language-specific initialization of CTX. */
338 lhd_initialize_diagnostics (diagnostic_context
*ctx ATTRIBUTE_UNUSED
)
342 /* Called to perform language-specific options initialization. */
344 lhd_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED
,
345 struct cl_decoded_option
*decoded_options ATTRIBUTE_UNUSED
)
349 /* By default, always complain about options for the wrong language. */
351 lhd_complain_wrong_lang_p (const struct cl_option
*option ATTRIBUTE_UNUSED
)
356 /* By default, no language-specific options are valid. */
358 lhd_handle_option (size_t code ATTRIBUTE_UNUSED
,
359 const char *arg ATTRIBUTE_UNUSED
,
360 int value ATTRIBUTE_UNUSED
, int kind ATTRIBUTE_UNUSED
,
361 location_t loc ATTRIBUTE_UNUSED
,
362 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
367 /* The default function to print out name of current function that caused
370 lhd_print_error_function (diagnostic_context
*context
, const char *file
,
371 diagnostic_info
*diagnostic
)
373 if (diagnostic_last_function_changed (context
, diagnostic
))
375 const char *old_prefix
= context
->printer
->prefix
;
376 tree abstract_origin
= diagnostic_abstract_origin (diagnostic
);
377 char *new_prefix
= (file
&& abstract_origin
== NULL
)
378 ? file_name_as_prefix (context
, file
) : NULL
;
380 pp_set_prefix (context
->printer
, new_prefix
);
382 if (current_function_decl
== NULL
)
383 pp_printf (context
->printer
, _("At top level:"));
390 ao
= BLOCK_ABSTRACT_ORIGIN (abstract_origin
);
391 while (TREE_CODE (ao
) == BLOCK
392 && BLOCK_ABSTRACT_ORIGIN (ao
)
393 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
394 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
395 gcc_assert (TREE_CODE (ao
) == FUNCTION_DECL
);
399 fndecl
= current_function_decl
;
401 if (TREE_CODE (TREE_TYPE (fndecl
)) == METHOD_TYPE
)
403 (context
->printer
, _("In member function %qs"),
404 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
407 (context
->printer
, _("In function %qs"),
408 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
410 while (abstract_origin
)
413 tree block
= abstract_origin
;
415 locus
= &BLOCK_SOURCE_LOCATION (block
);
417 block
= BLOCK_SUPERCONTEXT (block
);
418 while (block
&& TREE_CODE (block
) == BLOCK
419 && BLOCK_ABSTRACT_ORIGIN (block
))
421 ao
= BLOCK_ABSTRACT_ORIGIN (block
);
423 while (TREE_CODE (ao
) == BLOCK
424 && BLOCK_ABSTRACT_ORIGIN (ao
)
425 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
426 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
428 if (TREE_CODE (ao
) == FUNCTION_DECL
)
433 else if (TREE_CODE (ao
) != BLOCK
)
436 block
= BLOCK_SUPERCONTEXT (block
);
439 abstract_origin
= block
;
442 while (block
&& TREE_CODE (block
) == BLOCK
)
443 block
= BLOCK_SUPERCONTEXT (block
);
445 if (block
&& TREE_CODE (block
) == FUNCTION_DECL
)
447 abstract_origin
= NULL
;
451 expanded_location s
= expand_location (*locus
);
452 pp_comma (context
->printer
);
453 pp_newline (context
->printer
);
456 if (context
->show_column
)
457 pp_printf (context
->printer
,
458 _(" inlined from %qs at %r%s:%d:%d%R"),
459 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
460 "locus", s
.file
, s
.line
, s
.column
);
462 pp_printf (context
->printer
,
463 _(" inlined from %qs at %r%s:%d%R"),
464 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
465 "locus", s
.file
, s
.line
);
469 pp_printf (context
->printer
, _(" inlined from %qs"),
470 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
473 pp_colon (context
->printer
);
476 diagnostic_set_last_function (context
, diagnostic
);
477 pp_newline_and_flush (context
->printer
);
478 context
->printer
->prefix
= old_prefix
;
479 free ((char*) new_prefix
);
484 lhd_make_node (enum tree_code code
)
486 return make_node (code
);
490 lhd_to_target_charset (HOST_WIDE_INT c
)
496 lhd_expr_to_decl (tree expr
, bool *tc ATTRIBUTE_UNUSED
, bool *se ATTRIBUTE_UNUSED
)
501 /* Return sharing kind if OpenMP sharing attribute of DECL is
502 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
504 enum omp_clause_default_kind
505 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED
)
507 if (DECL_ARTIFICIAL (decl
))
508 return OMP_CLAUSE_DEFAULT_SHARED
;
509 return OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
512 /* Generate code to copy SRC to DST. */
515 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED
, tree dst
, tree src
)
517 return build2 (MODIFY_EXPR
, TREE_TYPE (dst
), dst
, src
);
520 /* Register language specific type size variables as potentially OpenMP
521 firstprivate variables. */
524 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*c ATTRIBUTE_UNUSED
,
525 tree t ATTRIBUTE_UNUSED
)
529 /* Return true if TYPE is an OpenMP mappable type. By default return true
530 if type is complete. */
533 lhd_omp_mappable_type (tree type
)
535 return COMPLETE_TYPE_P (type
);
538 /* Common function for add_builtin_function and
539 add_builtin_function_ext_scope. */
541 add_builtin_function_common (const char *name
,
544 enum built_in_class cl
,
545 const char *library_name
,
549 tree id
= get_identifier (name
);
550 tree decl
= build_decl (BUILTINS_LOCATION
, FUNCTION_DECL
, id
, type
);
552 TREE_PUBLIC (decl
) = 1;
553 DECL_EXTERNAL (decl
) = 1;
554 DECL_BUILT_IN_CLASS (decl
) = cl
;
556 DECL_FUNCTION_CODE (decl
) = (enum built_in_function
) function_code
;
558 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
559 gcc_assert (DECL_FUNCTION_CODE (decl
) == function_code
);
563 tree libname
= get_identifier (library_name
);
564 SET_DECL_ASSEMBLER_NAME (decl
, libname
);
567 /* Possibly apply some default attributes to this built-in function. */
569 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
571 decl_attributes (&decl
, NULL_TREE
, 0);
577 /* Create a builtin function. */
580 add_builtin_function (const char *name
,
583 enum built_in_class cl
,
584 const char *library_name
,
587 return add_builtin_function_common (name
, type
, function_code
, cl
,
589 lang_hooks
.builtin_function
);
592 /* Like add_builtin_function, but make sure the scope is the external scope.
593 This is used to delay putting in back end builtin functions until the ISA
594 that defines the builtin is declared via function specific target options,
595 which can save memory for machines like the x86_64 that have multiple ISAs.
596 If this points to the same function as builtin_function, the backend must
597 add all of the builtins at program initialization time. */
600 add_builtin_function_ext_scope (const char *name
,
603 enum built_in_class cl
,
604 const char *library_name
,
607 return add_builtin_function_common (name
, type
, function_code
, cl
,
609 lang_hooks
.builtin_function_ext_scope
);
613 lhd_builtin_function (tree decl
)
615 lang_hooks
.decls
.pushdecl (decl
);
619 /* Create a builtin type. */
622 add_builtin_type (const char *name
, tree type
)
624 tree id
= get_identifier (name
);
625 tree decl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, id
, type
);
626 return lang_hooks
.decls
.pushdecl (decl
);
631 /* Used to save and restore any previously active section. */
632 static section
*saved_section
;
635 /* Begin a new LTO output section named NAME. This default implementation
636 saves the old section and emits assembly code to switch to the new
640 lhd_begin_section (const char *name
)
644 /* Save the old section so we can restore it in lto_end_asm_section. */
645 gcc_assert (!saved_section
);
646 saved_section
= in_section
;
648 saved_section
= text_section
;
650 /* Create a new section and switch to it. */
651 section
= get_section (name
, SECTION_DEBUG
, NULL
);
652 switch_to_section (section
);
656 /* Write DATA of length LEN to the current LTO output section. This default
657 implementation just calls assemble_string and frees BLOCK. */
660 lhd_append_data (const void *data
, size_t len
, void *block
)
663 assemble_string ((const char *)data
, len
);
668 /* Finish the current LTO output section. This default implementation emits
669 assembly code to switch to any section previously saved by
670 lhd_begin_section. */
673 lhd_end_section (void)
677 switch_to_section (saved_section
);
678 saved_section
= NULL
;
682 /* Empty function that is replaced with appropriate language dependent
683 frame cleanup function for _Cilk_spawn. */
686 lhd_install_body_with_frame_cleanup (tree
, tree
)
690 /* Empty function to handle cilk_valid_spawn. */
692 lhd_cilk_detect_spawn (tree
*)